/* * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.awt.X11; import java.awt.*; import java.awt.event.*; import java.awt.peer.*; import java.lang.reflect.*; import sun.awt.AWTAccessor; class XScrollPanePeer extends XComponentPeer implements ScrollPanePeer, XScrollbarClient { public static final int MARGIN = 1; public static final int SCROLLBAR; public static final int SPACE = 2; public static final int SCROLLBAR_INSET = 2; public static final int VERTICAL = 1 << 0; public static final int HORIZONTAL = 1 << 1; static { SCROLLBAR = XToolkit.getUIDefaults().getInt("ScrollBar.defaultWidth"); } XVerticalScrollbar vsb; XHorizontalScrollbar hsb; XWindow clip; int active=VERTICAL; int hsbSpace; int vsbSpace; static class XScrollPaneContentWindow extends XWindow { XScrollPaneContentWindow(ScrollPane target, long parentWindow) { super(target, parentWindow); } public String getWMName() { return "ScrollPane content"; } } XScrollPanePeer(ScrollPane target) { super(target); // Create the clip window. The field "clip" must be null when // we call winCreate, or the parent of clip will be set to itself! clip = null; XWindow c = new XScrollPaneContentWindow(target,window); clip = c; vsb = new XVerticalScrollbar(this); hsb = new XHorizontalScrollbar(this); if (target.getScrollbarDisplayPolicy() == ScrollPane.SCROLLBARS_ALWAYS) { vsbSpace = hsbSpace = SCROLLBAR; } else { vsbSpace = hsbSpace = 0; } int unitIncrement = 1; Adjustable vAdjustable = target.getVAdjustable(); if (vAdjustable != null){ unitIncrement = vAdjustable.getUnitIncrement(); } int h = height-hsbSpace; vsb.setValues(0, h, 0, h, unitIncrement, Math.max(1, (int)(h * 0.90))); vsb.setSize(vsbSpace-SCROLLBAR_INSET, h); unitIncrement = 1; Adjustable hAdjustable = target.getHAdjustable(); if (hAdjustable != null){ unitIncrement = hAdjustable.getUnitIncrement(); } int w = width - vsbSpace; hsb.setValues(0, w, 0, w, unitIncrement, Math.max(1, (int)(w * 0.90))); hsb.setSize(w, hsbSpace-SCROLLBAR_INSET); setViewportSize(); clip.xSetVisible(true); } public long getContentWindow() { return (clip == null) ? window : clip.getWindow(); } public void setBounds(int x, int y, int w, int h, int op) { super.setBounds(x, y, w, h, op); if (clip == null) return; setScrollbarSpace(); setViewportSize(); repaint(); } public Insets getInsets() { return new Insets(MARGIN, MARGIN, MARGIN+hsbSpace, MARGIN+vsbSpace); } public int getHScrollbarHeight() { return SCROLLBAR; } public int getVScrollbarWidth() { return SCROLLBAR; } public void childResized(int w, int h) { if (setScrollbarSpace()) { setViewportSize(); } repaint(); } @SuppressWarnings("deprecation") Dimension getChildSize() { ScrollPane sp = (ScrollPane)target; if (sp.countComponents() > 0) { Component c = sp.getComponent(0); return c.size(); } else { return new Dimension(0, 0); } } @SuppressWarnings("deprecation") boolean setScrollbarSpace() { ScrollPane sp = (ScrollPane)target; boolean changed = false; int sbDisplayPolicy = sp.getScrollbarDisplayPolicy(); if (sbDisplayPolicy == ScrollPane.SCROLLBARS_NEVER) { return changed; } Dimension cSize = getChildSize(); if (sbDisplayPolicy == ScrollPane.SCROLLBARS_AS_NEEDED) { int oldHsbSpace = hsbSpace; int oldVsbSpace = vsbSpace; hsbSpace = (cSize.width <= (width - 2*MARGIN) ? 0 : SCROLLBAR); vsbSpace = (cSize.height <= (height - 2*MARGIN) ? 0 : SCROLLBAR); if (hsbSpace == 0 && vsbSpace != 0) { hsbSpace = (cSize.width <= (width - SCROLLBAR - 2*MARGIN) ? 0 : SCROLLBAR); } if (vsbSpace == 0 && hsbSpace != 0) { vsbSpace = (cSize.height <= (height - SCROLLBAR - 2*MARGIN) ? 0 : SCROLLBAR); } if (oldHsbSpace != hsbSpace || oldVsbSpace != vsbSpace) { changed = true; } } if (vsbSpace > 0) { int vis = height - (2*MARGIN) - hsbSpace; int max = Math.max(cSize.height, vis); vsb.setValues(vsb.getValue(), vis, 0, max); vsb.setBlockIncrement((int)(vsb.getVisibleAmount() * .90)); vsb.setSize(vsbSpace-SCROLLBAR_INSET, height-hsbSpace); // Adjustable vadj = sp.getVAdjustable(); // vadj.setVisibleAmount(vsb.vis); // vadj.setMaximum(vsb.max); // vadj.setBlockIncrement(vsb.page); } if (hsbSpace > 0) { int vis = width - (2*MARGIN) - vsbSpace; int max = Math.max(cSize.width, vis); hsb.setValues(hsb.getValue(), vis, 0, max); hsb.setBlockIncrement((int)(hsb.getVisibleAmount() * .90)); hsb.setSize(width-vsbSpace, hsbSpace-SCROLLBAR_INSET); // Adjustable hadj = sp.getHAdjustable(); // hadj.setVisibleAmount(hsb.vis); // hadj.setMaximum(hsb.max); // hadj.setBlockIncrement(hsb.page); } // Check to see if we hid either of the scrollbars but left // ourselves scrolled off of the top and/or right of the pane. // If we did, we need to scroll to the top and/or right of // the pane to make it visible. // // Reminder: see if there is a better place to put this code. boolean must_scroll = false; // Get the point at which the ScrollPane is currently located // if number of components > 0 Point p = new Point(0, 0); if (((ScrollPane)target).getComponentCount() > 0){ p = ((ScrollPane)target).getComponent(0).location(); if ((vsbSpace == 0) && (p.y < 0)) { p.y = 0; must_scroll = true; } if ((hsbSpace == 0) && (p.x < 0)) { p.x = 0; must_scroll = true; } } if (must_scroll) scroll(x, y, VERTICAL | HORIZONTAL); return changed; } void setViewportSize() { clip.xSetBounds(MARGIN, MARGIN, width - (2*MARGIN) - vsbSpace, height - (2*MARGIN) - hsbSpace); } public void setUnitIncrement(Adjustable adj, int u) { if (adj.getOrientation() == Adjustable.VERTICAL) { vsb.setUnitIncrement(u); } else { // HORIZONTAL hsb.setUnitIncrement(u); } } public void setValue(Adjustable adj, int v) { if (adj.getOrientation() == Adjustable.VERTICAL) { scroll(-1, v, VERTICAL); } else { // HORIZONTAL scroll(v, -1, HORIZONTAL); } } public void setScrollPosition(int x, int y) { scroll(x, y, VERTICAL | HORIZONTAL); } void scroll(int x, int y, int flag) { scroll(x, y, flag, AdjustmentEvent.TRACK); } /** * Scroll the contents to position x, y */ @SuppressWarnings("deprecation") void scroll(int x, int y, int flag, int type) { checkSecurity(); ScrollPane sp = (ScrollPane)target; Component c = getScrollChild(); if (c == null) { return; } int sx, sy; Color colors[] = getGUIcolors(); if (sp.getScrollbarDisplayPolicy() == ScrollPane.SCROLLBARS_NEVER) { sx = -x; sy = -y; } else { Point p = c.location(); sx = p.x; sy = p.y; if ((flag & HORIZONTAL) != 0) { hsb.setValue(Math.min(x, hsb.getMaximum()-hsb.getVisibleAmount())); ScrollPaneAdjustable hadj = (ScrollPaneAdjustable)sp.getHAdjustable(); setAdjustableValue(hadj, hsb.getValue(), type); sx = -(hsb.getValue()); Graphics g = getGraphics(); if (g != null) { try { paintHorScrollbar(g, colors, true); } finally { g.dispose(); } } } if ((flag & VERTICAL) != 0) { vsb.setValue(Math.min(y, vsb.getMaximum() - vsb.getVisibleAmount())); ScrollPaneAdjustable vadj = (ScrollPaneAdjustable)sp.getVAdjustable(); setAdjustableValue(vadj, vsb.getValue(), type); sy = -(vsb.getValue()); Graphics g = getGraphics(); if (g != null) { try { paintVerScrollbar(g, colors, true); } finally { g.dispose(); } } } } c.move(sx, sy); } private void setAdjustableValue(final ScrollPaneAdjustable adj, final int value, final int type) { AWTAccessor.getScrollPaneAdjustableAccessor().setTypedValue(adj, value, type); } @Override void paintPeer(final Graphics g) { final Color[] colors = getGUIcolors(); g.setColor(colors[BACKGROUND_COLOR]); final int h = height - hsbSpace; final int w = width - vsbSpace; g.fillRect(0, 0, w, h); // paint rectangular region between scrollbars g.fillRect(w, h, vsbSpace, hsbSpace); if (MARGIN > 0) { draw3DRect(g, colors, 0, 0, w - 1, h - 1, false); } paintScrollBars(g, colors); } private void paintScrollBars(Graphics g, Color[] colors) { if (vsbSpace > 0) { paintVerScrollbar(g, colors, true); // paint the whole scrollbar } if (hsbSpace > 0) { paintHorScrollbar(g, colors, true); // paint the whole scrollbar } } void repaintScrollBars() { Graphics g = getGraphics(); Color colors[] = getGUIcolors(); if (g != null) { try { paintScrollBars(g, colors); } finally { g.dispose(); } } } public void repaintScrollbarRequest(XScrollbar sb) { Graphics g = getGraphics(); Color colors[] = getGUIcolors(); if (g != null) { try { if (sb == vsb) { paintVerScrollbar(g, colors, true); } else if (sb == hsb) { paintHorScrollbar(g, colors, true); } } finally { g.dispose(); } } } public void handleEvent(java.awt.AWTEvent e) { super.handleEvent(e); int id = e.getID(); switch(id) { case PaintEvent.PAINT: case PaintEvent.UPDATE: repaintScrollBars(); break; } } /** * Paint the horizontal scrollbar to the screen * * @param g the graphics context to draw into * @param colors the colors used to draw the scrollbar * @param paintAll paint the whole scrollbar if true, just the thumb if false */ void paintHorScrollbar(Graphics g, Color colors[], boolean paintAll) { if (hsbSpace <= 0) { return; } Graphics ng = g.create(); g.setColor(colors[BACKGROUND_COLOR]); // SCROLLBAR is the height of scrollbar area // but the actual scrollbar is SCROLLBAR-SPACE high; // the rest must be filled with background color int w = width - vsbSpace - (2*MARGIN); g.fillRect(MARGIN, height-SCROLLBAR, w, SPACE); g.fillRect(0, height-SCROLLBAR, MARGIN, SCROLLBAR); g.fillRect(MARGIN + w, height-SCROLLBAR, MARGIN, SCROLLBAR); try { ng.translate(MARGIN, height - (SCROLLBAR - SPACE)); hsb.paint(ng, colors, paintAll); } finally { ng.dispose(); } } /** * Paint the vertical scrollbar to the screen * * @param g the graphics context to draw into * @param colors the colors used to draw the scrollbar * @param paintAll paint the whole scrollbar if true, just the thumb if false */ void paintVerScrollbar(Graphics g, Color colors[], boolean paintAll) { if (vsbSpace <= 0) { return; } Graphics ng = g.create(); g.setColor(colors[BACKGROUND_COLOR]); // SCROLLBAR is the width of scrollbar area // but the actual scrollbar is SCROLLBAR-SPACE wide; // the rest must be filled with background color int h = height - hsbSpace - (2*MARGIN); g.fillRect(width-SCROLLBAR, MARGIN, SPACE, h); g.fillRect(width-SCROLLBAR, 0, SCROLLBAR, MARGIN); g.fillRect(width-SCROLLBAR, MARGIN+h, SCROLLBAR, MARGIN); try { ng.translate(width - (SCROLLBAR - SPACE), MARGIN); vsb.paint(ng, colors, paintAll); } finally { ng.dispose(); } } /** * * @see java.awt.event.MouseEvent * MouseEvent.MOUSE_CLICKED * MouseEvent.MOUSE_PRESSED * MouseEvent.MOUSE_RELEASED * MouseEvent.MOUSE_MOVED * MouseEvent.MOUSE_ENTERED * MouseEvent.MOUSE_EXITED * MouseEvent.MOUSE_DRAGGED */ public void handleJavaMouseEvent( MouseEvent mouseEvent ) { super.handleJavaMouseEvent(mouseEvent); int modifiers = mouseEvent.getModifiers(); int id = mouseEvent.getID(); int x = mouseEvent.getX(); int y = mouseEvent.getY(); // super.handleMouseEvent(mouseEvent); if ((modifiers & InputEvent.BUTTON1_MASK) == 0) { return; } switch (id) { case MouseEvent.MOUSE_PRESSED: if (inVerticalScrollbar(x,y )) { active = VERTICAL; int h = height - hsbSpace - (2*MARGIN); vsb.handleMouseEvent(id,modifiers,x - (width - SCROLLBAR + SPACE),y-MARGIN); } else if (inHorizontalScrollbar(x, y) ) { active = HORIZONTAL; int w = width - 2*MARGIN - vsbSpace; hsb.handleMouseEvent(id,modifiers,x-MARGIN,y-(height - SCROLLBAR + SPACE)); } break; // On mouse up, pass the event through to the scrollbar to stop // scrolling. The x & y passed do not matter. case MouseEvent.MOUSE_RELEASED: // winReleaseCursorFocus(); if (active == VERTICAL) { vsb.handleMouseEvent(id,modifiers,x,y); } else if (active == HORIZONTAL) { hsb.handleMouseEvent(id,modifiers,x,y); } break; case MouseEvent.MOUSE_DRAGGED: if ((active == VERTICAL)) { int h = height - 2*MARGIN - hsbSpace; vsb.handleMouseEvent(id,modifiers,x-(width - SCROLLBAR + SPACE),y-MARGIN); } else if ((active == HORIZONTAL)) { int w = width - 2*MARGIN - vsbSpace; hsb.handleMouseEvent(id,modifiers,x-MARGIN,y-(height - SCROLLBAR + SPACE)); } break; } } /** * return value from the scrollbar */ public void notifyValue(XScrollbar obj, int type, int v, boolean isAdjusting) { if (obj == vsb) { scroll(-1, v, VERTICAL, type); } else if ((XHorizontalScrollbar)obj == hsb) { scroll(v, -1, HORIZONTAL, type); } } /** * return true if the x and y position is in the verticalscrollbar */ boolean inVerticalScrollbar(int x, int y) { if (vsbSpace <= 0) { return false; } int h = height - MARGIN - hsbSpace; return (x >= width - (SCROLLBAR - SPACE)) && (x < width) && (y >= MARGIN) && (y < h); } /** * return true if the x and y position is in the horizontal scrollbar */ boolean inHorizontalScrollbar(int x, int y) { if (hsbSpace <= 0) { return false; } int w = width - MARGIN - vsbSpace; return (x >= MARGIN) && (x < w) && (y >= height - (SCROLLBAR - SPACE)) && (y < height); } private Component getScrollChild() { ScrollPane sp = (ScrollPane)target; Component child = null; try { child = sp.getComponent(0); } catch (ArrayIndexOutOfBoundsException e) { // do nothing. in this case we return null } return child; } int vval; int hval; int vmax; int hmax; /* * Print the native component by rendering the Motif look ourselves. * ToDo(aim): needs to query native motif for more accurate size and * color information. */ @SuppressWarnings("deprecation") public void print(Graphics g) { ScrollPane sp = (ScrollPane)target; Dimension d = sp.size(); Color bg = sp.getBackground(); Color fg = sp.getForeground(); Point p = sp.getScrollPosition(); Component c = getScrollChild(); Dimension cd; if (c != null) { cd = c.size(); } else { cd = new Dimension(0, 0); } int sbDisplay = sp.getScrollbarDisplayPolicy(); int vvis, hvis, vmin, hmin, vmax, hmax, vval, hval; switch (sbDisplay) { case ScrollPane.SCROLLBARS_NEVER: hsbSpace = vsbSpace = 0; break; case ScrollPane.SCROLLBARS_ALWAYS: hsbSpace = vsbSpace = SCROLLBAR; break; case ScrollPane.SCROLLBARS_AS_NEEDED: hsbSpace = (cd.width <= (d.width - 2*MARGIN)? 0 : SCROLLBAR); vsbSpace = (cd.height <= (d.height - 2*MARGIN)? 0 : SCROLLBAR); if (hsbSpace == 0 && vsbSpace != 0) { hsbSpace = (cd.width <= (d.width - SCROLLBAR - 2*MARGIN)? 0 : SCROLLBAR); } if (vsbSpace == 0 && hsbSpace != 0) { vsbSpace = (cd.height <= (d.height - SCROLLBAR - 2*MARGIN)? 0 : SCROLLBAR); } } vvis = hvis = vmin = hmin = vmax = hmax = vval = hval = 0; if (vsbSpace > 0) { vmin = 0; vvis = d.height - (2*MARGIN) - hsbSpace; vmax = Math.max(cd.height - vvis, 0); vval = p.y; } if (hsbSpace > 0) { hmin = 0; hvis = d.width - (2*MARGIN) - vsbSpace; hmax = Math.max(cd.width - hvis, 0); hval = p.x; } // need to be careful to add the margins back in here because // we're drawing the margin border, after all! int w = d.width - vsbSpace; int h = d.height - hsbSpace; g.setColor(bg); g.fillRect(0, 0, d.width, d.height); if (hsbSpace > 0) { int sbw = d.width - vsbSpace; g.fillRect(1, d.height - SCROLLBAR - 3, sbw - 1, SCROLLBAR - 3); Graphics ng = g.create(); try { ng.translate(0, d.height - (SCROLLBAR - 2)); drawScrollbar(ng, bg, SCROLLBAR - 2, sbw, hmin, hmax, hval, hvis, true); } finally { ng.dispose(); } } if (vsbSpace > 0) { int sbh = d.height - hsbSpace; g.fillRect(d.width - SCROLLBAR - 3, 1, SCROLLBAR - 3, sbh - 1); Graphics ng = g.create(); try { ng.translate(d.width - (SCROLLBAR - 2), 0); drawScrollbar(ng, bg, SCROLLBAR - 2, sbh, vmin, vmax, vval, vvis, false); } finally { ng.dispose(); } } draw3DRect(g, bg, 0, 0, w - 1, h - 1, false); target.print(g); sp.printComponents(g); } }